fix canplaythrough

media/base/media_switches.cc

Index: media/base/media_switches.cc
diff --git a/media/base/media_switches.cc b/media/base/media_switches.cc
index 6911c914e712f6df8bfe7e79bdbd55ea3c9c554a..8297caf426f8706d59dd1500b31406fd4df3439d 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -190,6 +190,10 @@ const base::Feature kBackgroundVideoTrackOptimization{
 const base::Feature kBackgroundVideoPauseOptimization{
     "BackgroundVideoPauseOptimization", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// CanPlayThrough issued according to standard.
+const base::Feature kCanPlayThrough{
+    "CanPlayThrough", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Make MSE garbage collection algorithm more aggressive when we are under
 // moderate or critical memory pressure. This will relieve memory pressure by
 // releasing stale data from MSE buffers.